/**
 * Copyright 2017 伊永飞
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.yea.remote.netty.send;

import java.util.Map;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.ConcurrentHashMap;

import com.yea.remote.netty.balancing.RemoteClient;

import io.netty.channel.Channel;

/**
 * 
 * @author yiyongfei
 *
 */
public final class SendHelperRegister {
	private static final Lock lock = new ReentrantLock();
	private static Map<Channel, SendHelper> _NettySend = new ConcurrentHashMap<Channel, SendHelper>();

	public static SendHelper registerInstance(RemoteClient node, IUnavailableSend unavailableSend) {
		lock.lock();
		try {
			if (_NettySend.containsKey(node.getChannel())) {
				_NettySend.remove(node.getChannel());
			}
			_NettySend.put(node.getChannel(), new SendHelper(node.getChannel(), node, unavailableSend));
			return _NettySend.get(node.getChannel());
		} finally {
			lock.unlock();
		}
	}
	
	public static void unregisterInstance(RemoteClient node) {
		lock.lock();
		try {
			if (_NettySend.containsKey(node.getChannel())) {
				_NettySend.remove(node.getChannel());
			}
		} finally {
			lock.unlock();
		}
	}
	
	public static SendHelper getInstance(Channel channel) {
		return _NettySend.get(channel);
	}
}
